TY - JOUR
T1 - A note on local and non-local properties of turbulence in the Bora flow
AU - Belusic, Danijel
AU - Pasaric, Miroslava
AU - Pasaric, Zoran
AU - Orlic, Mirko
AU - Grisogono, Branko
PY - 2006
Y1 - 2006
N2 - On the basis of two-month measurements of the bora wind at Senj, Croatia, with a 1 s temporal resolution, properties of the bora turbulence are inspected using the records of three bora episodes. The spectrum is divided into two parts: high-frequency turbulence (periods less than 1 min) and the low-frequency part (periods between 1 and 10 min) where pulsations appear. We have found that the high-frequency turbulence is generated locally by surface roughness and local wind shear. On the other hand, the low-frequency turbulence, i.e. the pulsations, seems to be independent of the local properties and can therefore be treated as an organized non-local effect. This is in accordance with the studies of the pulsations in the Boulder downslope windstorm
AB - On the basis of two-month measurements of the bora wind at Senj, Croatia, with a 1 s temporal resolution, properties of the bora turbulence are inspected using the records of three bora episodes. The spectrum is divided into two parts: high-frequency turbulence (periods less than 1 min) and the low-frequency part (periods between 1 and 10 min) where pulsations appear. We have found that the high-frequency turbulence is generated locally by surface roughness and local wind shear. On the other hand, the low-frequency turbulence, i.e. the pulsations, seems to be independent of the local properties and can therefore be treated as an organized non-local effect. This is in accordance with the studies of the pulsations in the Boulder downslope windstorm
UR - http://www.schweizerbart.de/resources/downloads/paper_previews/55044.pdf
U2 - 10.1127/0941-2948/2006/0127
DO - 10.1127/0941-2948/2006/0127
M3 - Article
SN - 0941-2948
VL - 15
SP - 301
EP - 306
JO - Meteorologische Zeitschrift
JF - Meteorologische Zeitschrift
IS - 3
ER -